Remove configuration files section (Arch Linux)

This is already being done, maybe since as far back as
0d7732930ac304c2442ac4c1e53bfbb035c2a84c
Merge pull request #3843 from kennyballou/develop

Remove configuration files section (Arch Linux)
Reformat the docs main page

This moves the docs towards being better suited for newcomers and
directs people to needed reference materials
Fixed typo in Walkthrough
fix bug: file.recurse remove empty dirs if clean and include_empty set
Merge pull request #3842 from archtaku/quickfix

Fix traceback in format_log
Merge pull request #3844 from dhepper/patch-1

Fixed typo in Walkthrough
Merge pull request #3847 from giantlock/develop

fix bug: file.recurse remove empty dirs if clean and include_empty set both
move gather bootstrap to config
Remove qemu module
Add qemu img module
Add qemu_nbd module
Change qemu to qemu_nbd to reflect name split
Recommend debconf-utils and do it in salt-common. fixes #3834
Fix a typo and try to squeeze in pydsl along the py renderer to give it more publicity! ;)
Ubuntu firewall rules are already included
Merge pull request #3849 from kjkuan/salt-doc-update

Fix a typo and try to squeeze in pydsl along the py renderer to give it a bit more publicity! ;)
Merge pull request #3850 from seanchannel/develop

Ubuntu firewall rules are already included
Restored saltstack theme
Updated docs with new design